Improved Fully Differential Analog Filters

Massarotto, Marco; Casas, Óscar; Ferrari, Vittorio; Pallás-Areny, R.

doi:10.1109/tim.2007.904572

Cited by 14 publications

(9 citation statements)

References 10 publications

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“…If the circuit is not stable, it must be re-designed on the basis of another SE circuit topology. Not all SE topologies lead to stable FD circuits by mirroring (Massarotto et al, 2007). …”

Section: Proposed Methodsmentioning

confidence: 99%

A design method for active high-CMRR fully-differential circuits

Spinelli

Hornero²,

Casas³

et al. 2012

IJIT

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A simple method for designing instrumentation fully-differential (FD) circuits based on standard single-ended (SE) operational amplifiers (OAs) is presented. It departs from a SE prototype that verifies the desired differential-mode transfer function, thereby leading to FD versions of the circuit. These circuits have a high common mode rejection ratio (CMRR), independent of component imbalances, and a unity common-mode gain. The proposed method does not allow the design of common-mode response, but it does verify common-mode stability, thus ensuring stable FD circuits. It is intended for instrumentation applications in which high CMRRs are required. The proposed approach makes it possible to design and implement inverter and non-inverter topologies as well. Design examples and experimental data are presented. Using general-purpose OAs and 5%-tolerance components, the CMRR of these circuits easily exceeds 90 to 100 dB. 104E.M. Spinelli et al.

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“…If the circuit is not stable, it must be re-designed on the basis of another SE circuit topology. Not all SE topologies lead to stable FD circuits by mirroring (Massarotto et al, 2007). …”

Section: Proposed Methodsmentioning

confidence: 99%

A design method for active high-CMRR fully-differential circuits

Spinelli

Hornero²,

Casas³

et al. 2012

IJIT

Self Cite

View full text Add to dashboard Cite

show abstract

“…This topology has presented instability problems in FD filters (Massarotto et al, 2007). Appling the proposed method to the SE prototype of Figure 6(a), the CM equivalent circuit, shown in Figure 6(b) results.…”

Section: Sallen-key Topologymentioning

confidence: 99%

“…Also, they are designed for high-frequency applications (hundreds of MHz bandwidth), which results in high power consumption. For instrumentation applications, it is therefore more appropriate to design FD circuits based on SE OAs (Massarotto et al, 2007;Jorgovanovic et al, 2009), which allows the selection of devices with low power consumption, single-supply power sources, low noise figures or rail-torail capability. …”

Section: Introductionmentioning

confidence: 99%

A design method for active high-CMRR fully-differential circuits

Spinelli

Hornero²,

Casas³

et al. 2013

IJIT

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“…7 Approximation theory is concerned with how an arbitrary actual function can be represented by other simple approximating polynomials, such as the Fourier series, 8 the Taylor series, 9 and the Chebyshev series (CSs). 11 For example, during the design process of analogue filter circuits, 12 computer-aided design software uses the actual filter functions to approximate the ideal filter performance. 11 For example, during the design process of analogue filter circuits, 12 computer-aided design software uses the actual filter functions to approximate the ideal filter performance.…”

Section: Introductionmentioning

confidence: 99%

“…10 The approximation method and its accuracy are crucial to computer-aided technology. 11 For example, during the design process of analogue filter circuits, 12 computer-aided design software uses the actual filter functions to approximate the ideal filter performance. Any approximation method certainly introduces errors, E = |P(x) − f(x)|, where P(x) is the approximating polynomial, f(x) is the actual function, and E is the introduced error.…”

Section: Introductionmentioning

confidence: 99%

Differential equation description and Chebyshev approximation of linear time‐invariant circuits

Huang

Yao

2018

Circuit Theory & Apps

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The approximation technology of analogue circuit functions is crucial to the computer-aided simulation, analysis, and design automation of electronic circuits. Chebyshev polynomials and various differential equations are proposed in this paper to approximate the functions of linear time-invariant circuits. The coefficient calculation methods of the Chebyshev expansion and the differential equation matrices are thoroughly deduced, and the construction methods employed in the functions and the actual time mapping of the linear timeinvariant circuits are presented in this paper. An example of an analogue filter verifies the effectiveness and accuracy of the proposed approximation algorithm and elaborates on the selection process of the order number and the time step length of the Chebyshev expansion according to the demanded truncation error.

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Improved Fully Differential Analog Filters

Cited by 14 publications

References 10 publications

A design method for active high-CMRR fully-differential circuits

A design method for active high-CMRR fully-differential circuits

A design method for active high-CMRR fully-differential circuits

Differential equation description and Chebyshev approximation of linear time‐invariant circuits

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